Got no idea how TipTop was activated, but from what I found out on the net its a HW petrol driven spinner, quite different from a FW flipper to handle...anyway wont argue with that, if its seen as dangerous way of activation I'll have to figure out another way

Any ideas apart from putting a hole in the flipper plate?

The valve is the one marked with an arrow
isolation valve.jpg

The valve is similar to this:
http://www.ebay.co.uk/itm/2x-New-CO2...item3a7fc6eb43